This is a custom tab bar I intended to put up on the screen. However, my partner want the text to be slightly up. How can I do so?
Why don't you just have an empty title property for your view controller and add the title to your custom images for the tab?
UPDATE: For the sake of completeness of answer; from comments and ios tabbar put text in the middle when no image
[tab.tabBarItem setTitlePositionAdjustment:UIOffsetMake(0, -10)]